Evaporator for mechanical refrigeration



July 26, 1932. F..G. SLAGEL ,1

EVAPORATOR FOR MECHANICAL REFRIGERATION Filed July 29, 1929 fZE.

{5E tin-iii g l Q E am b llI m :2; m m I N N m Q n Patented July 26, 1932 UNITE STATES FRANKLIN G. SLAGEL, OF BUFFALO, NEW YORK, ASSIGNORTO FEDDERS MANUFACTUR- ING COMPANY, IN C., 0F BUFFALO, NEW YORK, A CORPORATION OF NEW YORK EVAPORATOR FOR MECHANICAL REFRIGERATION Application filed July 29, 1929.

This invention relates to mechanical refrigerating systems, and more particularly evaporators which form one part of refrigerating systems.

An object of the invention is to provide an evaporator having a large surface exposed for heat transfer which can be economically manufactured.

Another object of my invention is to provide an evaporator having a food storage part which can readily be attached and detached from a vessel part.

A further object of my invention is to provide an evaporator in which the food storage portion is formed of a separate casting.

Still another object of my invention is to provide an evaporator in which the supporting means is utilized to secure the vessel section and the food storage section together.

Another object of the invention is to provide a sectional evaporator in which the food storage section is isolated from refrigerant in the vessel section, although associated in heat transfer relation.

Other objects will appear as the description of the invention progresses.

In the accompanying drawing Fig. 1 is a front elevation of an evaporator constructed in accordance with my invention; and Fig. 2 is a side elevation of the same.

Referring to the drawing by characters of reference, 10 represents a cylindrical sheet metal vessel which is adapted to contain a body of liquid refrigerant. The vessel is made preferably of sheet copper which is formed as an enclosure except for an open end which isclosed by the end plate 11 with which a refrigerant inlet union 12 and outlet union 13 are secured. It will be understood that the vessel is adapted to connect in circuit with a compressor and a condenser through connections attached to the unions in the conventional association, and that the usual valve mechanism is arranged within the vessel for admitting refrigerant to maintain a constant body thereof in the vessel.

The vessel forms one section of the evaporator, while the casting 14: forms another section thereof. Such casting is formed with an interior chamber, or compartment 15 for Serial No. 381,974.

the reception of trays 16 for containing food or water to be frozen, ribs 17 being formed on the interior walls to support the trays. The front wall 18 of the casting has an opening therethrough, permitting access to the compartment, which is closed by the door 20 having a. bracket 21 secured thereto by screws 22. The bracket is pivotally mounted on the pin 23 which is carried by the spaced bosses 24 on the top of the casing extension 25 above the door opening. Except for the door opening the casing is formed to enclose the food containing trays which are adapted to be placed therein.

The upper wall of the casting is semicircular to provide a saddle 26 for the reception of the cylindrical vessel. The side walls 27 of the casting have spaced vertical ribs 28 projecting therefrom to increase the heat transfer wall area thereof, the end ribs extending below the bottom wall 29 to provide supporting legs 30 for the evaporator, in case it is not suspended. The saddle wall encloses substantially one half of the cylindrical vessel and the adjacent wall surfaces thereof are in intimate metallic contact, except for openings 31 in the saddle wall which are formed to reduce weight and to permit direct contact of air circulating in the compartment with the vessel. It will be seen however, that the vessel closes such openings in the saddle wall.

The suspension means is utilized for detachablv clamping the vessel within the saddle wall. A pair of brackets 32 are bent to conform to the shape of the vessel,the ends 33 thereof being bent upwardly and outward 1y for attachment to the wall of a chamber to be cooled. A pair of studs 34 extend through each bracket and are screwed into the casting, nuts 35 being employed to draw the brackets tightly against the vessel.

It will be seen that the evaporator described can be cheaply manufactured and assembled, and that it is composed of sections which can be readily detached without shutting off the refrigerant circuit. There is also adequate heat transfer from the casting to the vessel, although no refrigerant flows through the casting, the large contacting surfaces of the saddle and vessel providing such result. Further, the utilization of the supporting device assists in simplification and reduction of the parts required.

Various changes can be made in the structure described without departing from the spirit of the invention and the scope of the claims.

What I claim is 1. An evaporator comprising a closed cylindrical liquid refrigerant containing vessel having an inlet and an outlet, a cast metal structure formed with an interior storage compartment and a top wall complementary to the vessel, studs extending from the top wall of the metal structure on opposite sides of the vessel, straps extending across the vessel through which the studs extend, said straps having raised ends adapted to be secured to a supporting surface, and means engaging the studs and the straps for clamping the vessel against the metal structure.

2. An evaporator comprising a closed cylindrlcal liquid refrigerant containing vessel having inlet and outlet ports, a cast metal structure formed with an interior compartment and a top wall complementary to and coextensive with the vessel, said vessel seating in the recess in the top wall, and detachable means clamping the vessel to the metal structure, said means including straps formed with ends extending above the vessel adapted to be secured to a supporting wall.

3. An evaporator comprising a closed cylindrical liquid refrigerant containing vessel having an inlet and an outlet, a cast metal structure formed with an interior compartment and with side walls partially enclosing the vessel, spaced line on the side walls eX- tending substantially the full height of the walls and partially in a plane with the vessel, and means for clamping the vessel against the metal structure in thermal contact with the side Walls. 7

In testimony whereof I have hereunto signed my name this 16th day of June, 1929.

FRANKLIN e. SLAGEL. 

